Sewing machine



FIG. 1 is a perspective view of a sewing machine;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof.

The dot chain lines illustrated a boundary between claimed and unclaimed surfaces and form no part of the claimed design.

The broken lines depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a sewing machine, as shown and described. 